/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package org.apt.ServletAdmin;

import com.myapp.DAO.LectureAuthorDao;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.myapp.DAO.PaymentLectureDao;
import com.myapp.DAO.LectureDao;

/**
 *
 * @author Administrator
 */
public class deleteLecture extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String lectureID = request.getParameter("ID");
        try {
            if (PaymentLectureDao.getPaymentLectureByLectureID(Integer.parseInt(lectureID)).getID() > 0) {
                out.print("<script>alert('you can not delete this lecture because it using for one Order !');window.location.href='/Admin/list_lecture.jsp?pageno=1';</script>");
            } else {
                if (LectureAuthorDao.getLectureAuthorByLectureID(Integer.parseInt(lectureID)).getID() > 0) {
                    out.print("<script>alert('you can not delete this lecture because it using for one Author !');window.location.href='/Admin/list_lecture.jsp?pageno=1';</script>");
                } else {
                    if (LectureDao.deleteLecture(Integer.parseInt(lectureID))) {
                        out.print("<script>alert('Delete lecture success!');window.location.href='/Admin/list_lecture.jsp?pageno=1';</script>");
                    } else {
                        out.print("<script>alert('Delete lecture fail!');window.location.href='/Admin/list_lecture.jsp?pageno=1';</script>");
                    }
                }
            }
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
